CN2080726U

CN2080726U - Common starting controller for starting two or more electric motors

Info

Publication number: CN2080726U
Application number: CN 90219530
Authority: CN
Inventors: 邓景福; 邓景滨
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-10-17
Filing date: 1990-10-17
Publication date: 1991-07-10

Abstract

The utility model relates to a common starting controlling device for starting multiple electric motors and is provided with a multiple path timing mechanism. The common starting controlling device only needs one auto starting pressing bearing apparatus and the timing mechanism is used to control the starting time of the multiple electric motors. The common starting controlling device has small size, simple structure, easy mastering and popularity.

Description

Common starting controller for starting two or more electric motors

The utility model belongs to multiple motors central control device design and manufacturing technology field.

Present used Electric Machine Control and central control device all adopts the electrical control cubicles or the Electronic Accounting Machine Unit of unit control mode, and its control cubicle equipment is huge, complex structure.Though and Computer Control Unit equipment advanced person, the expense height be difficult for to be popularized.

It is little, simple in structure that the purpose of this utility model provides a kind of volume, only need a shared autotransformer of employing, utilize the adjustable required starting time of multicircuit time mechanism controls multiple motors, use common relay-contactor to finish the interior break-make of time that timing controller provides, and connection with the instantaneous triggering main circuit contact of relay system circuits for triggering device, finish the conversion of starting voltage, make multiple motors can enter the shared start-control device of operate as normal.

The utility model comprises shell and movement.The main circuit structure as shown in Figure 5; Constitute by main circuit (as shown in Figure 1) and control circuit (as shown in Figure 2).

Its main circuit structure is, on 380 volts of pressure-wires, connect autotransformer AT through autotransformer line switching Z, lv contactor ZL through controlled motor is connected with controlled motor D again, is connected with the operating voltage line through motor line contactor ZN again, forms the loop.

Its control circuit exchanges start control circuit by 220 volts again and 24 volts of relay system DC pulse circuits for triggering constitute;

Its AC control circuit comprises a cover multicircuit time mechanism (as shown in Figure 4) again, and its syndeton is; Through 2 pairs of normally opened contacts of knob QA1, the one tunnel is connected with indicator light HD with timer motor M with the QJ contact through relay QJ, again through timer projection and normally opened contact ZD, TZ ₁, TZL ₁Connect, often open contact TZ, ZD again and be connected with autotransformer input contactor Z.

QA ₁Another road and relay SJ ₁, relay contact SJ ₁, autotransformer low pressure output relay ZL ₁Connect, with the contactor ZL of control low pressure output relay ₁

SJ ₁Relay connects the DC pulse circuits for triggering through DC power supply, through relay contact SJ ₁Connect relay IGN ₁With diode D ₁, resistance R ₁, capacitor C ₁Deng.

The multi-path timer structure is common motor timer as shown in Figure 4.Multi-path timer is driven and is studded with cam, the cam rotary drum of being made up of projection 73 by the reduction gearing 2 of micro synchronous motor 1 and speed ratio 1.5, and sensitive switch 4 is formed with the pull bar that is connected sensitive switch, roller.

Timer motor output shaft rotating speed, per minute one changes, and through 1.5 speed ratio reductions of speed, cam drum barrel rotating speed is that per minute 0.75 changes,

The time that drum barrel whenever circles is 60 seconds/0.75=80 second

Drum barrel diameter D=70MM, girth are 220MM

The time that the drum barrel circumference is whenever walked 1MM is 80/220=0.364 second

The time of rotation 10MM arc length is 3.64 seconds.

Each projection with moulding the unit of making adjustable cam firmly, is arranged in the timer cam by each unit by the requirement of starting sequential again.And, control the start control circuit work of motor with cam roof pressure sensitive switch.

There is a small column on the top of each projection, and cylinder on the projection and the circular hole on the drum barrel adopt tight assembling to close, and with simplified construction, is convenient to adjust.

The cam of multi-path timer row number, remove be used to control shared sensitive switch contact ZD and Z two exclusive, all the other row's numbers are TZL ₁N, ZN ₁Row's number of n contact switch, promptly TZL has 1-n row, and ZN has 1-n row.

The timer cam adds up to 2n+2 row.N is by the platform number of starting motor.Suppose that with 5 motor be example, it is 12 rows that timer drum barrel cam is always arranged number.

Course of action of the present utility model is: when pressing the button QA, its 2 pairs of normal opened contact closures, No. one engage relay QJ, make the relay QJ closing of contact, connect motor timer M and indicator light HD, make timer under motor drives, since 0 rotation, indicator light HD is bright.The cam that multi-path timer is arranged chronologically is with normally opened contact ZD, TZ, TZL ₁Closure, normally-closed contact TZL simultaneously ₁, ZD disconnects, and connects autotransformer input contactor coil Z, makes coil contact Z closure, makes autotransformer input energized.At this moment, another road engage relay SJ ₁, relay contact SJ ₁Connect the low pressure output relay ZL of autotransformer ₁, the closing of contact, motor D ₁Enter low-pressure operation.When multichannel starting timer requires to go to starting time-delay ultimate position chronologically, the timer cam by sensitive switch with normally opened contact TZ, TZL ₁Disconnect, thereupon impulse circuit contact ZL ₁, TZL ₁Closed.SJ ₁Closed when starting.

Because timer has cut off TZ, TZL ₁, make the low pressure of autotransformer export contactor TZL ₁Z disconnects with the input contactor.This moment is because SJ ₁Be in closure state, the normally closed contact IGN in the impulse circuit ₁, ZL ₁Closed thereupon, normally closed contact TZL ₁Also closed when low pressure is cut off, impulse circuit is at capacitor C ₁Effect under send the short-time pulse electric current, make relay IGN ₁Contactor is connected ZN ₁Contactor coil, and self-locking are with motor D ₁Thereby insert under the rated voltage and finish whole starting process.

At this moment, under the control of timer, with impulse circuit IGN ₁Cut off SJ in the circuit ₁Disconnect relay IGN ₁Outage, timer automatically restores to 0, makes control circuit be in the ready to start state of another motor again.

In the utility model main circuit safety device and detecting instrument etc. can be set.Button AN on the relay ZJ can go between to by near the controlled motor, uses when meeting emergency and need shut down.

Characteristics of the present utility model are that volume is little, and are simple in structure, only need a starting autotransformer, i.e. may command multiple motors, and flexible operation is easy to grasp and popularize.

Description of drawings

Fig. 1 is the utility model main circuit structure schematic diagram

Fig. 2 is the utility model control circuit figure

Fig. 3 is the utility model timer preface figure (being a motor starting control circuit action sequence)

Fig. 4 is the utility model timer construction figure

1-uses synchronous motor 2-gear 3-timer drum barrel 4-sensitive switch 5-outlet plug 6-pull bar 7-timer projection

Fig. 5 is the utility model line assumption diagram, and as the summary illustration.

Embodiment

With reference to this specification the 5th part and accompanying drawing, press the known technology of mechano-electronic industry, can implement.

Claims

1, the shared start-control device of multiple motors is made of shell and movement, only needing it is characterized in that a shared auto-transformer, adopts a cover multicircuit time mechanism in control circuit.

2, control device according to claim 1, the line construction that it is characterized in that control circuit is QA ₁Two pairs of normally opened contacts, the one tunnel is connected with indicator light HD with timer motor M with the QJ contact through relay QJ, again through timer projection and normally opened contact ZD, TZL, TZL ₁Connect, often open contact TZ, ZD again and be connected QA with autotransformer input contactor Z ₁Another road and relay SJ ₁, relay contact SJ ₁, autotransformer low pressure output relay ZL ₁Connect, with the contactor ZL of control low pressure output relay ₁, SJ ₁Relay links the DC pulse circuits for triggering through DC power supply, through relay contact SJ ₁Connect relay IGN ₁, diode D ₁, resistance R ₁With capacitor C ₁

3, control device according to claim 1, the structure that it is characterized in that multicircuit time mechanism is to be made of synchronous motor 1, reduction gearing 2, the cam that studs with projection 7 and cam rotary drum 3, sensitive switch 4, outlet plug 5 and pull bar 6, each cam outer end studs with a circle projection, arrange 1～n row cam vertically, be drilled with the small sircle hole that matches with the drum projection on the drum barrel wall, be equipped with the contact of arranging in the hole according to control timing.